HR 244

HR 244
Observation data; Epoch J2000 Equinox J2000
Constellation	Cassiopeia
Right ascension	00h 53m 04.195899s[1]
Declination	+61° 07′ 26.3018″[1]
Apparent magnitude (V)	4.80[2]
Characteristics
Evolutionary stage	main sequence
Spectral type	F9V[3]
B−V color index	0.540±0.008[4]
Astrometry
Radial velocity (Rv)	+20.682±0.001[1] km/s
Proper motion (μ)	RA: –68.016[1] mas/yr ; Dec.: +169.274[1] mas/yr
Parallax (π)	53.1896 ± 0.1273[1] mas
Distance	61.3 ± 0.1 ly ; (18.80 ± 0.04 pc)
Absolute magnitude (MV)	3.44[4]
Details
Mass	1.194[5] M☉
Radius	1.74+0.06; −0.03[1] R☉
Luminosity	3.78±0.01[1] L☉
Surface gravity (log g)	0.53[2] cgs
Temperature	6,105+45; −105[1] K
Metallicity [Fe/H]	0.04[5] dex
Rotational velocity (v sin i)	8.1[2] km/s
Age	5.3[5] Gyr
Other designations
	BD+60°124, GJ 41, HD 5015, HIP 4151, HR 244, SAO 11444, WDS J00531+6107A[6]
Database references
SIMBAD	data

HR 244 is a single[7] star in the constellation Cassiopeia. It has a yellow-white hue and is visible to the naked eye with an apparent visual magnitude of 4.80.[2] Based upon parallax measurements, it is located at a distance of 61 light years from the Sun, and is drifting further away with a radial velocity of +20.7 km/s;[1] around 546,000 years ago it passed within 38 light-years of the Sun.[4] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.183 arcseconds per annum.[8]

This object is an F-type main-sequence star with a stellar classification of F9V,[3] a star that is currently fusing its core hydrogen. It is 5.3[5] billion years old and is spinning with a projected rotational velocity of 8 km/s.[2] The star has 1.2[5] times the mass of the Sun and 1.7[1] times the Sun's radius. It is radiating 3.78 times the luminosity of the Sun from its photosphere at an effective temperature of 6,105 K.[1]

References

Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
Luck, R. Earle (January 2017), "Abundances in the Local Region II. F, G, and K Dwarfs and Subgiants", The Astronomical Journal, 153 (1): 19, arXiv:1611.02897, Bibcode:2017AJ....153...21L, doi:10.3847/1538-3881/153/1/21, 21.
Abt, Helmut A. (January 2009), "MK Classifications of Spectroscopic Binaries", The Astrophysical Journal Supplement, 180 (1): 117–118, Bibcode:2009ApJS..180..117A, doi:10.1088/0067-0049/180/1/117.
Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
Boyajian, Tabetha S.; et al. (July 2013), "Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations", The Astrophysical Journal, 771 (1): 40, arXiv:1306.2974, Bibcode:2013ApJ...771...40B, doi:10.1088/0004-637X/771/1/40.
"HD 5015". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-02.
Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal, 129 (3): 1483–1522, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854.

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[GaiaDR2-1] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[Earle2017-2] Luck, R. Earle (January 2017), "Abundances in the Local Region II. F, G, and K Dwarfs and Subgiants", The Astronomical Journal, 153 (1): 19, arXiv:1611.02897, Bibcode:2017AJ....153...21L, doi:10.3847/1538-3881/153/1/21, 21.

[Abt2009-3] Abt, Helmut A. (January 2009), "MK Classifications of Spectroscopic Binaries", The Astrophysical Journal Supplement, 180 (1): 117–118, Bibcode:2009ApJS..180..117A, doi:10.1088/0067-0049/180/1/117.

[Anderson2012-4] Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.

[Boyajian2013-5] Boyajian, Tabetha S.; et al. (July 2013), "Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations", The Astrophysical Journal, 771 (1): 40, arXiv:1306.2974, Bibcode:2013ApJ...771...40B, doi:10.1088/0004-637X/771/1/40.

[SIMBAD-6] "HD 5015". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-02.

[Eggleton2008-7] Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.

[Lepine2005-8] Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal, 129 (3): 1483–1522, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854.